/*
 Copyright (C) 2009 Stig Brautaset. All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
 
 * Redistributions of source code must retain the above copyright notice, this
 list of conditions and the following disclaimer.
 
 * Redistributions in binary form must reproduce the above copyright notice,
 this list of conditions and the following disclaimer in the documentation
 and/or other materials provided with the distribution.
 
 * Neither the name of the author nor the names of its contributors may be used
 to endorse or promote products derived from this software without specific
 prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#import "NSObject+Json.h"

@implementation NSObject (NSObject_JsonWriting)

- (NSString *)JSONRepresentation
{
    if ([NSJSONSerialization isValidJSONObject:self]) {
        NSError *error;
        NSData *data = [NSJSONSerialization dataWithJSONObject:self
                                                       options:0
                                                         error:&error];
        NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
#if __has_feature(objc_arc)
        return result;
#else
        return [result autorelease];
#endif
    } else {
        return [self description];
    }
}

@end

/// Adds JSON parsing methods to NSString
@implementation NSString (NSString_JsonParsing)

/**
 @brief Decodes the receiver's JSON text
 
 @return the NSDictionary or NSArray represented by the receiver, or nil on error.
 
 @see @ref json2objc
 */
- (id)JSONValue
{
	NSData *data = [self dataUsingEncoding:NSUTF8StringEncoding];
    __autoreleasing NSError *error = nil;
    id result = [NSJSONSerialization JSONObjectWithData:data
												options:kNilOptions error:&error];
    if (error != nil) {
        return nil;
    }
    return result;
}

@end



@implementation NSObject (NSObject_JsonObjc)


+ (NSString *)convertJsonToStringFromJSONObject:(id)object {
    if (!object) {
        return nil;
    }
    NSError *error;
    
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:object options:NSJSONWritingPrettyPrinted error:&error];
    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    
    if (error) {
        return nil;
    }
    return jsonString;
}


+ (id)convertJsonStringToJSONObjectFromJsonString:(NSString *)jsonString {
    if (!jsonString) {
        return nil;
    }
    
    NSError *error;
    NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
    NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData
                                                        options:NSJSONReadingMutableContainers
                                                          error:&error];
    
    if (error) {
        return nil;
    }
    return dic;
}

+ (id)resolveToJsonObject:(id)json {
    NSString *responseString = [self convertJsonToStringFromJSONObject:json];
    id jsonObject = [self convertJsonStringToJSONObjectFromJsonString:responseString];
    return jsonObject;
}


@end
